synthesis

the combining of the constituent elements of separate material or abstract entities into a single or unified entity (opposed to analysis,) the separating of any material or abstract entity into its constituent elements.

a complex whole formed by combining.

Chemistry. the forming or building of a more complex substance or compound from elements or simpler compounds.

Philosophy. the third stage of argument in Hegelian dialectic, which reconciles the mutually contradictory first two propositions, thesis and antithesis.